Blades, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.1 °F (low) to 66.2 °F (high). Annual precipitation averages 47 Inches. Blades is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.9 °F | 44.3 °F | 3.44 in. |
| February | 27.1 °F | 47.1 °F | 3.0 in. |
| March | 33.3 °F | 53.9 °F | 4.16 in. |
| April | 43.8 °F | 64.9 °F | 3.56 in. |
| May | 53.5 °F | 74.0 °F | 3.83 in. |
| June | 63.0 °F | 82.8 °F | 4.18 in. |
| July | 67.8 °F | 87.2 °F | 4.38 in. |
| August | 65.4 °F | 85.0 °F | 4.77 in. |
| September | 59.2 °F | 79.5 °F | 4.52 in. |
| October | 47.6 °F | 69.0 °F | 4.07 in. |
| November | 36.6 °F | 58.1 °F | 3.29 in. |
| December | 30.3 °F | 49.1 °F | 3.83 in. |
| Annual | 46.1 °F | 66.2 °F | 47.03 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |